31cb567e21
Using integers for maths gets unstable past 38 interations even in double precision. Using the original values/10 is safe up to the default 100 iterations.
106 lines
1.8 KiB
C++
106 lines
1.8 KiB
C++
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#include "OMP3Stream.h"
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template <class T>
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OMP3Stream<T>::OMP3Stream(const unsigned int ARRAY_SIZE, T *a, T *b, T *c)
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{
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array_size = ARRAY_SIZE;
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this->a = (T*)malloc(sizeof(T)*array_size);
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this->b = (T*)malloc(sizeof(T)*array_size);
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this->c = (T*)malloc(sizeof(T)*array_size);
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}
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template <class T>
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OMP3Stream<T>::~OMP3Stream()
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{
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free(a);
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free(b);
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free(c);
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}
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template <class T>
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void OMP3Stream<T>::write_arrays(const std::vector<T>& h_a, const std::vector<T>& h_b, const std::vector<T>& h_c)
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{
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#pragma omp parallel for
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for (int i = 0; i < array_size; i++)
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{
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a[i] = h_a[i];
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b[i] = h_b[i];
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c[i] = h_c[i];
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}
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}
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template <class T>
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void OMP3Stream<T>::read_arrays(std::vector<T>& h_a, std::vector<T>& h_b, std::vector<T>& h_c)
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{
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#pragma omp parallel for
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for (int i = 0; i < array_size; i++)
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{
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h_a[i] = a[i];
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h_b[i] = b[i];
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h_c[i] = c[i];
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}
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}
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template <class T>
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void OMP3Stream<T>::copy()
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{
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#pragma omp parallel for
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for (int i = 0; i < array_size; i++)
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{
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c[i] = a[i];
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}
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}
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template <class T>
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void OMP3Stream<T>::mul()
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{
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const T scalar = 0.3;
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#pragma omp parallel for
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for (int i = 0; i < array_size; i++)
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{
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b[i] = scalar * c[i];
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}
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}
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template <class T>
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void OMP3Stream<T>::add()
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{
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#pragma omp parallel for
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for (int i = 0; i < array_size; i++)
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{
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c[i] = a[i] + b[i];
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}
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}
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template <class T>
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void OMP3Stream<T>::triad()
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{
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const T scalar = 0.3;
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#pragma omp parallel for
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for (int i = 0; i < array_size; i++)
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{
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a[i] = b[i] + scalar * c[i];
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}
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}
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void listDevices(void)
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{
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std::cout << "0: CPU" << std::endl;
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}
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std::string getDeviceName(const int)
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{
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return std::string("Device name unavailable");
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}
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std::string getDeviceDriver(const int)
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{
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return std::string("Device driver unavailable");
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}
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template class OMP3Stream<float>;
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template class OMP3Stream<double>;
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